#!/bin/bash
num_a=$1
num_b=$2

# -z表示$num_a的长度等于0
if [ -z $num_a ];then
 echo "please input num_a"
 exit
fi

if [ -z $num_b ];then
  echo "please input num_b"
  exit
fi

if [ $num_a -gt $num_b ];then
  echo "num_a = $num_a ,num_b = $num_b,num_a > num_b"
else
  echo "num_a = $num_a ,num_b = $num_b,num_a < num_b"
fi

